Gurobi 5.0.1 (linux64) logging started Mon Nov 19 06:44:41 2012

Optimize a model with 1599 rows, 81 columns and 3198 nonzeros
Presolve removed 1120 rows and 0 columns
Presolve time: 0.04s
Presolved: 479 rows, 81 columns, 3034 nonzeros
Variable types: 0 continuous, 81 integer (81 binary)
Found heuristic solution: objective 7.0000000

Root relaxation: objective 1.271303e+01, 283 iterations, 0.01 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0   12.71303    0   72    7.00000   12.71303  81.6%     -    0s
H    0     0                       8.0000000   12.71303  58.9%     -    0s
     0     0   12.05481    0   81    8.00000   12.05481  50.7%     -    0s
     0     0   12.03200    0   81    8.00000   12.03200  50.4%     -    0s
     0     0   12.01363    0   80    8.00000   12.01363  50.2%     -    0s
     0     0   12.00829    0   79    8.00000   12.00829  50.1%     -    0s
     0     0   12.00067    0   80    8.00000   12.00067  50.0%     -    0s
     0     0   11.99613    0   80    8.00000   11.99613  50.0%     -    0s
     0     0   11.99451    0   80    8.00000   11.99451  49.9%     -    0s
     0     0   11.99432    0   80    8.00000   11.99432  49.9%     -    0s
     0     2   11.99344    0   80    8.00000   11.99344  49.9%     -    0s
*   36    15               4       9.0000000   11.66703  29.6%  56.6    0s

Cutting planes:
  Clique: 51
  Zero half: 2
  Mod-K: 1

Explored 54 nodes (3485 simplex iterations) in 0.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%